//===- llvm/System/Unix/Unix.h - Common Unix Include File -------*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This file defines things specific to Unix implementations.
//===----------------------------------------------------------------------===//
#include "llvm/Config/config.h" // Get autoconf configuration settings
+#include "llvm/System/Errno.h"
#include <cstdlib>
#include <cstdio>
#include <cstring>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
-#endif
+#endif
#ifdef HAVE_ASSERT_H
#include <assert.h>
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif
-inline void ThrowErrno(const std::string& prefix) {
- char buffer[MAXPATHLEN];
-#ifdef HAVE_STRERROR_R
- // strerror_r is thread-safe.
- strerror_r(errno,buffer,MAXPATHLEN-1);
-#elif HAVE_STRERROR
- // Copy the thread un-safe result of strerror into
- // the buffer as fast as possible to minimize impact
- // of collision of strerror in multiple threads.
- strncpy(buffer,strerror(errno),MAXPATHLEN-1);
- buffer[MAXPATHLEN-1] = 0;
-#else
- // Strange that this system doesn't even have strerror
- // but, oh well, just use a generic message
- sprintf(buffer, "Error #%d", errno);
-#endif
- throw prefix + ": " + buffer;
+/// This function builds an error message into \p ErrMsg using the \p prefix
+/// string and the Unix error number given by \p errnum. If errnum is -1, the
+/// default then the value of errno is used.
+/// @brief Make an error message
+///
+/// If the error number can be converted to a string, it will be
+/// separated from prefix by ": ".
+static inline bool MakeErrMsg(
+ std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
+ if (!ErrMsg)
+ return true;
+ if (errnum == -1)
+ errnum = errno;
+ *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum);
+ return true;
}
#endif